The word 甜蜜 is formed by combining two characters, each contributing a layer of sensory meaning to create a unified abstract concept. The first character, 甜 (tián), directly means "sweet" as in taste. The second, 蜜 (mì), means "honey", a substance that is the archetype of sweetness itself. Their combination is not merely additive but deeply metaphorical; the concrete, viscous, and rich quality of "honey" intensifies and embodies the simple idea of "sweet", transforming it from a literal flavor into a full sensory experience used to describe emotional states like happiness, affection, and blissful joy.